我段管内线路,大部位于沿海山麓,沿线遍布小桥涵,而跨度6米以下的小钢梁桥占桥梁总数的95％以上。这些桥梁大多数是解放前修建的。由于当时技术水平低和偷工减料等原因,质量低劣,病害繁多。解放后,随着祖国建设事业飞跃发展,运输日益繁忙,机车类型 I section tube line, most of the coastal foothills, along the small bridges and culverts, and the span of less than 6 meters of steel girders accounted for more than 95% of the total number of bridges. Most of these bridges were built just before liberation. Due to the low level of technology and jerry-building and other reasons at that time, poor quality and numerous diseases. After the liberation, with the rapid development of the cause of building the motherland, transportation is increasingly busy, locomotive type